Fibre Bragg Grating-Based Acoustic Sensor Array for Improved Condition Monitoring of Marine Lifting Surfaces

Vidakovic, Miodrag; Armakolas, Ioannis; Sun, Tao; Carlton, J.S.; Grattan, K. T. V.

doi:10.1109/jlt.2016.2601122

Cited by 13 publications

(4 citation statements)

References 27 publications

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“…In marine applications, simulated AE signals have previously been measured on a submerged steel half rudder blade. Measurement and localisation of an AE source was performed while comparing different sensor types [29]. Furthermore, AE investigations on composite tidal turbine blades are emerging [30].…”

Section: Introductionmentioning

confidence: 99%

Acoustic emission monitoring of composite marine propellers in submerged conditions using embedded piezoelectric sensors

Huijer,

Kassapoglou,

Pahlavan

2024

Smart Mater. Struct.

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Flexible composite marine propellers can aid the marine industry in reducing carbon emissions and underwater radiated noise pollution. The structural integrity of the blades can be assessed using structural health monitoring. One of these methods is the measurement and analysis of damage-induced acoustic emission signals. This paper experimentally investigates the feasibility of using embedded piezoelectric sensors for the measurement of acoustic emissions throughout a submerged flexible composite marine propeller blade. A full-scale glass-fibre reinforced polymer blade has been manufactured with 24 embedded sensors. While suspended in artificial seawater, acoustic emissions were simulated on the blade. The measurements show that the embedded piezoelectric sensors can measure acoustic emissions while the blade is submerged. Further, the distance from source to sensor over which the acoustic emission is measurable was investigated. For a noise level of 40dB and a source amplitude of 70dB between 100-250kHz, an average maximum measurable distance of 124mm was obtained. For higher frequencies, the distance drops and for lower noise levels the distance increases.

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Section: Introductionmentioning

confidence: 99%

Acoustic emission monitoring of composite marine propellers in submerged conditions using embedded piezoelectric sensors

Huijer,

Kassapoglou,

Pahlavan

2024

Smart Mater. Struct.

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“…Compared to traditional capacitive or piezoelectric acoustic sensors, optical fiber acoustic sensor has unique advantages, such as passive, corrosion resistant, light weight, freedom from the interference of electromagnetic irradiation, and multiplexing capability [1][2][3][4] . A variety of fiber optic acoustic sensors have been demonstrated over the past decades, including Fiber Bragg grating (FBG) [5,6] ,…”

Section: Introductionmentioning

confidence: 99%

A high-sensitivity EFPI acoustic sensor based on silicone rubber diaphragm

Yong-zhang

Zheng²,

Xiao³

et al. 2023

Advanced Optical Manufacturing Technologies and Applications 2022; And 2nd International Forum of Young Scientists on Advanced

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A high-sensitivity optical fiber acoustic probe based on extrinsic Fabry-Perot interferometer (EFPI) is designed, fabricated, and analyzed. The sound sensitive diaphragm fabricated by silicone rubber exhibits excellent properties including good adhesion, high mechanical strength, flexibility, aging resistance, and biocompatibility. The acoustic pressure change introduces the periodic vibration of silicone rubber diaphragm, which causes the fluctuation of the output voltage. The FP cavity is formed by a cleaved end face of fiber and the silicone rubber diaphragm. The silicone rubber is prepared by a simple spin-dip method, which is easy to fabricate and suitable for mass production. A high acoustic pressure sensitivity and a high signal-to-noise ratio (SNR) of 387 mV/Pa and 48 dB at 1.5 kHz were obtained, respectively. The sensor is expected to be suitable for photoacoustic spectroscopy, week acoustic detections and biological application.

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“…In order to improve the responsivity of FBGs at very low-pressure levels, Moccia et al used a ring-shaped polymer's coating and demonstrated a microphone with a minimum detectable acoustic signal of about 10 mPa Hz −1 [17]. The excellent multiplexing capability of the FBG based microphones has been effectively utilized for condition monitoring of marine lifting surfaces and also for crack monitoring in historical masonry [18,19]. However, the requirement of temperature compensation techniques and the sophisticated fabrication process increases the complexity of the sensor and its cost as well.…”

Section: Introductionmentioning

confidence: 99%

S-shaped microfiber based diaphragm supported optical microphone

2019

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We propose and demonstrate a simple and highly sensitive optical microphone based on S-shaped tapered fibre (STF). The short pigtailed end of the STF is attached to the centre of a thin circular nitrile diaphragm. The applied acoustic signal deforms the nitrile diaphragm and due to the affixation, the STF structure gets modified leading to change in the bending angles of the two STF bends. As a consequence, the photodetector output, detecting the reflected light intensity of the STF, varies in accordance with the applied acoustic signal. Various properties of the proposed sensing setup can be easily tailored by changing the diaphragm diameter and thickness, and the shapes and size of the STF. For an optimized configuration, the proposed sensor achieves a sensitivity of 3.07 mV Pa −1 and a minimum detectable pressure of 36.48 mPa Hz −1 . The sensor shows a linear behaviour up to 1300 Hz and the experimental value of its first order natural frequency is

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Fibre Bragg Grating-Based Acoustic Sensor Array for Improved Condition Monitoring of Marine Lifting Surfaces

Abstract: This is the accepted version of the paper.This version of the publication may differ from the final published version. Permanent repository link:

Cited by 13 publications

References 27 publications

Acoustic emission monitoring of composite marine propellers in submerged conditions using embedded piezoelectric sensors

Acoustic emission monitoring of composite marine propellers in submerged conditions using embedded piezoelectric sensors

A high-sensitivity EFPI acoustic sensor based on silicone rubber diaphragm

S-shaped microfiber based diaphragm supported optical microphone

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